If you knew history, you'd know this has been tried before. The shuttle boosters did this; they barely saved any money after refurbishing.

SpaceX tried it too, but had significant problems even re-entering without the rocket ripping apart, not even getting to the problems of recovering and refurbishing salt-water damaged hardware.

This kind of attitude might have made more sense before SpaceX had demonstrated it was possible. After showing how the technology can be further refined for full and rapid reuse, and landing on Mars, it just reads as ignorant or intentionally misleading.